cosmopolitan/libc/intrin/cxalock.c
Justine Tunney 02e1cbcd00
Revert "Make spin locks go faster"
This reverts commit c8e25d811c.
2024-07-25 22:24:32 -07:00

38 lines
2.2 KiB
C

/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2022 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/intrin/cxaatexit.h"
#include "libc/thread/thread.h"
static pthread_mutex_t __cxa_lock_obj;
void __cxa_wipe(void) {
pthread_mutex_init(&__cxa_lock_obj, 0);
}
void __cxa_lock(void) {
pthread_mutex_lock(&__cxa_lock_obj);
}
void __cxa_unlock(void) {
pthread_mutex_unlock(&__cxa_lock_obj);
}
__attribute__((__constructor__(60))) static textstartup void __cxa_init() {
pthread_atfork(__cxa_lock, __cxa_unlock, __cxa_wipe);
}